Journal
LANGMUIR
Volume 31, Issue 28, Pages 7782-7791Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.langmuir.5b00422
Keywords
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Funding
- Fundamental Research Funds for the Central Universities [2232015A3-05]
- Shanghai Natural Science Foundation [15ZR1400700]
- New Century Training Program Foundation for the Talents by the State Education Commission [NCET-11-0095]
- Natural Science Foundation of China [51002030]
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Friction and wear properties of graphene, nanosheets prepared by different processes as solid lubricant on silicon dioxide have,been comparatively studied via calibrated atomic force microscopy. The effects of normal load, humidity, and;velocity on the friction were also investigated All kinds of graphene nanosheets possess friction reduction properties on the nanoscale. Mechanically exfoliated graphene nanosheets exhibit ultralubrication and. zero wear under high pressure due to perfect graphitic structure and a hydrophobic surface. Defects in chemical vapor deposited graphene nanosheets decrease the antiwear and friction-reduction capability. The graphene oxide nanosheets (GOS) show the weakest friction-reduction properties on account of destroyed graphitic structure and a hydrophilic surface. The reduced graphene oxide nanosheets (RGOS) possess better friction reduction than GOS by virtue of hydrophobic surface properties. Both RGOS:and GOS have weak antiwear properties due to the, destroyed graphitic structure. Antiwear properties are correlated strongly with the structure, and friction depends mainly on the structure and surface properties:
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